The harmful effects of soil pollution may come from direct contact with polluted soil or from contact with other resources, such as water or food which has been grown on or come in direct contact with the polluted soil.
A reason for your arm or hand falling asleep at night could be because of having a stroke. A stroke is a life-threatening emergency that happens when there is a disruption in the flow of blood to your brain. This can cause paralysis, loss of consciousness, numbness on one side of the body, and impaired speech.
Sleeping on Your Arm. Sometimes the cause of a tingling hand or arm is simply the result of sleeping on your arm or hand for a long period of time. The pressure of your body's weight can disrupt nerve pathways and circulation to that particular part of the body. The brain then isn't sure how to respond.